40243234205 has 16 divisors (see below), whose sum is σ = 50413017600. Its totient is φ = 30781690368.

The previous prime is 40243234153. The next prime is 40243234253. The reversal of 40243234205 is 50243234204.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 40243234205 - 2¹⁸ = 40242972061 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 200621 + ... + 347469.

It is an arithmetic number, because the mean of its divisors is an integer number (3150813600).

Almost surely, 2^40243234205 is an apocalyptic number.

It is an amenable number.

40243234205 is a deficient number, since it is larger than the sum of its proper divisors (10169783395).

40243234205 is a wasteful number, since it uses less digits than its factorization.

40243234205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149260.

The product of its (nonzero) digits is 23040, while the sum is 29.

Adding to 40243234205 its reverse (50243234204), we get a palindrome (90486468409).

Subtracting 40243234205 from its reverse (50243234204), we obtain a palindrome (9999999999).

The spelling of 40243234205 in words is "forty billion, two hundred forty-three million, two hundred thirty-four thousand, two hundred five".